地质通报2016，Vol.35Issue(10)：1715-1723,9.
长江口水下三角洲沉积物粒度组成及其在减沙背景下的响应
Grain size of recent sediments in Yangtze River subaqueous delta and its response to sediments supply decline
摘要
Abstract
The response of Yangtze River subaquatic delta to river sediment decline has attracted more and more attention in recent years. In this paper, grain sizes and radiometric 210Pb and 137Cs of the cores in different areas of the subaquatic delta were analyzed to explore the response to river sediment decline and change of hydrodynamic force. The results show that grain sizes of core CDZS 10 sediments are much coarser than those of the other three cores which might be closely related to the block of north branch of Yang⁃tze River in the estuary after 1954. In terms of sediment composition the authors found grain size coarsening up from 1.2m (1979) in Core CDZS10 which might be an obvious response to significant sediments supply decline of the Yangtze River after the 1980’s. In addition, the block of north branch and impoundment hasled to the mud region moving southward and extending to Hangzhou Bay and Shengsi Islands.关键词
粒度/减砂/北支/响应/海洋动力Key words
grain size/sediment decline/north branch/response/marine dynamics分类
海洋科学引用本文复制引用
战庆,王张华,陈勇,赵宝成..长江口水下三角洲沉积物粒度组成及其在减沙背景下的响应[J].地质通报,2016,35(10):1715-1723,9.基金项目
中国地质调查局项目（编号GZH201200506）、国土资源部项目 （）
